body{
    background-image: url(../images/微信图片_20221115184942.png);
    background-repeat: no-repeat;
    background-size: cover;
   
}
.container{
    width: 1000px;
    height: 600px;
    margin: 100px auto;
    position: relative;
}

.row{
    display: flex;
    justify-content: space-between;
}

.item{
    opacity: 0.5;
}

.active{
    opacity: 1;
}

.btn{
    background-image: url(../images/DT.jpeg);
    background-repeat: no-repeat;
    width: 200px;
    height: 68px;
    color: #fff;
    line-height: 75px;
    text-align: center;
    cursor: pointer;
    font-size:60px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%,-50%);

}